Among the common ferromagnetic metals, cobalt has distinct magnetic properties, so incorporation of cobalt nanoparticles in the nickel nanofibers, which reveals better magnetic properties compared with the bulk, might have considerable impact. In this study, we are introducing cobalt-doped nickel nanofibers prepared by electrospinning. Electrospinning of a colloidal solution rather than a sol-gel (which is widely utilized in the conventional electrospinning technique) has been invoked as a novel strategy to prepare cobalt nanoparticles/nickel acetate/poly(vinyl alcohol) nanofiber mats. Physiochemical characterizations indicated that calcination of the dried electrospun mats in argon atmosphere at 700 degrees C for 5 h leads to produce cobalt-doped nickel nanofibers. Overall, magnetic properties studied pointed to improvement of the magnetic parameters of the synthesized cobalt-doped nickel nanofibers compared with the pristine ones.